何凯文每日一句:2017考研英语第55句
2017考研基础阶段的复习时间已经过去了一大半，再过一两个月就要进入强化复习阶段了，基础复习还没跟上来的同学，接下来就要加快步伐更努力一点了。基础阶段在2017考研英语复习上，同学们主要搞定词汇、长难句和语法等基础知识。文都考研小编每日给大家分享文都何凯文老师的句子，帮大家打好2017考研英语的基础。以下是第55句：The role of natural selection in evolution was formulated only a little more than a hundred years ago，and the selective role of the environment in shaping and maintaining the behavior of the individual is only beginning to be recognized and studied.
词汇突破：1.in evolution 在演化中
2.formulated 阐述;表述;解释;论证
3.shaping 形成(造就)
4.maintaining 保持，维护
5.recognized 认可，承认
主干识别：这里是两个并列句：
1. The role of natural selection was formulated.
2. The selective role of the environment is only beginning to be recognized and studied.
切分成分：only a little more than a hundred years ago 状语
in shaping and maintaining the behavior of the individual 状语
(注意：状语的位置一般在主语后，动词前。)
参考译文：自然选择在进化中的作用仅在一百多年前才得以阐明，而环境在塑造和保持个体行为时的选择作用则刚刚开始被认识和研究。
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